diff options
Diffstat (limited to 'misc/regexp.h')
| -rw-r--r-- | misc/regexp.h | 203 |
1 files changed, 3 insertions, 200 deletions
diff --git a/misc/regexp.h b/misc/regexp.h index 42394f78cf..9f5c413d28 100644 --- a/misc/regexp.h +++ b/misc/regexp.h @@ -25,206 +25,9 @@ were encouraged to use <regex.h> instead. It was officially withdrawn from the standard in Issue 6 (aka POSIX.1-2001). - This header is provided only for backward compatibility. - It will be removed in the next release of the GNU C Library. - New code should use <regex.h> instead. */ + The GNU C Library provided this header through version 2.22. */ -#warning "<regexp.h> will be removed in the next release of the GNU C Library." -#warning "Please update your code to use <regex.h> instead (no trailing 'p')." - -#include <features.h> -#include <alloca.h> -#include <regex.h> -#include <stdlib.h> -#include <string.h> - -/* The implementation provided here emulates the needed functionality - by mapping to the POSIX regular expression matcher. The interface - for the here included function is weird (this really is a harmless - word). - - The user has to provide six macros before this header file can be - included: - - INIT Declarations vor variables which can be used by the - other macros. - - GETC() Return the value of the next character in the regular - expression pattern. Successive calls should return - successive characters. - - PEEKC() Return the value of the next character in the regular - expression pattern. Immediately successive calls to - PEEKC() should return the same character which should - also be the next character returned by GETC(). - - UNGETC(c) Cause `c' to be returned by the next call to GETC() and - PEEKC(). - - RETURN(ptr) Used for normal exit of the `compile' function. `ptr' - is a pointer to the character after the last character of - the compiled regular expression. - - ERROR(val) Used for abnormal return from `compile'. `val' is the - error number. The error codes are: - 11 Range endpoint too large. - 16 Bad number. - 25 \digit out of range. - 36 Illegal or missing delimiter. - 41 No remembered search string. - 42 \( \) imbalance. - 43 Too many \(. - 44 More tan two numbers given in \{ \}. - 45 } expected after \. - 46 First number exceeds second in \{ \}. - 49 [ ] imbalance. - 50 Regular expression overflow. - - */ - -__BEGIN_DECLS - -/* Interface variables. They contain the results of the successful - calls to `setp' and `advance'. */ -extern char *loc1; -extern char *loc2; - -/* The use of this variable in the `advance' function is not - supported. */ -extern char *locs; - - -#ifndef __DO_NOT_DEFINE_COMPILE -/* Get and compile the user supplied pattern up to end of line or - string or until EOF is seen, whatever happens first. The result is - placed in the buffer starting at EXPBUF and delimited by ENDBUF. - - This function cannot be defined in the libc itself since it depends - on the macros. */ -char * -compile (char *__restrict instring, char *__restrict expbuf, - const char *__restrict endbuf, int eof) -{ - char *__input_buffer = NULL; - size_t __input_size = 0; - size_t __current_size = 0; - int __ch; - int __error; - INIT - - /* Align the expression buffer according to the needs for an object - of type `regex_t'. Then check for minimum size of the buffer for - the compiled regular expression. */ - regex_t *__expr_ptr; -# if defined __GNUC__ && __GNUC__ >= 2 - const size_t __req = __alignof__ (regex_t *); -# else - /* How shall we find out? We simply guess it and can change it is - this really proofs to be wrong. */ - const size_t __req = 8; -# endif - expbuf += __req; - expbuf -= (expbuf - ((char *) 0)) % __req; - if (endbuf < expbuf + sizeof (regex_t)) - { - ERROR (50); - } - __expr_ptr = (regex_t *) expbuf; - /* The remaining space in the buffer can be used for the compiled - pattern. */ - __expr_ptr->__REPB_PREFIX (buffer) = expbuf + sizeof (regex_t); - __expr_ptr->__REPB_PREFIX (allocated) - = endbuf - (char *) __expr_ptr->__REPB_PREFIX (buffer); - - while ((__ch = (GETC ())) != eof) - { - if (__ch == '\0' || __ch == '\n') - { - UNGETC (__ch); - break; - } - - if (__current_size + 1 >= __input_size) - { - size_t __new_size = __input_size ? 2 * __input_size : 128; - char *__new_room = (char *) alloca (__new_size); - /* See whether we can use the old buffer. */ - if (__new_room + __new_size == __input_buffer) - { - __input_size += __new_size; - __input_buffer = (char *) memcpy (__new_room, __input_buffer, - __current_size); - } - else if (__input_buffer + __input_size == __new_room) - __input_size += __new_size; - else - { - __input_size = __new_size; - __input_buffer = (char *) memcpy (__new_room, __input_buffer, - __current_size); - } - } - __input_buffer[__current_size++] = __ch; - } - if (__current_size) - __input_buffer[__current_size++] = '\0'; - else - __input_buffer = ""; - - /* Now compile the pattern. */ - __error = regcomp (__expr_ptr, __input_buffer, REG_NEWLINE); - if (__error != 0) - /* Oh well, we have to translate POSIX error codes. */ - switch (__error) - { - case REG_BADPAT: - case REG_ECOLLATE: - case REG_ECTYPE: - case REG_EESCAPE: - case REG_BADRPT: - case REG_EEND: - case REG_ERPAREN: - default: - /* There is no matching error code. */ - ERROR (36); - case REG_ESUBREG: - ERROR (25); - case REG_EBRACK: - ERROR (49); - case REG_EPAREN: - ERROR (42); - case REG_EBRACE: - ERROR (44); - case REG_BADBR: - ERROR (46); - case REG_ERANGE: - ERROR (11); - case REG_ESPACE: - case REG_ESIZE: - ERROR (50); - } - - /* Everything is ok. */ - RETURN ((char *) (__expr_ptr->__REPB_PREFIX (buffer) - + __expr_ptr->__REPB_PREFIX (used))); -} -#endif - - -/* Find the next match in STRING. The compiled regular expression is - found in the buffer starting at EXPBUF. `loc1' will return the - first character matched and `loc2' points to the next unmatched - character. */ -extern int step (const char *__restrict __string, - const char *__restrict __expbuf) __THROW; - -/* Match the beginning of STRING with the compiled regular expression - in EXPBUF. If the match is successful `loc2' will contain the - position of the first unmatched character. */ -extern int advance (const char *__restrict __string, - const char *__restrict __expbuf) __THROW; - - -__END_DECLS +#error "The GNU C Library no longer implements <regexp.h>." +#error "Please update your code to use <regex.h> instead (no trailing 'p')." #endif /* regexp.h */ |